There are scams aplenty out there on the internet, and I’ve already had fun investigating some.

Today I’m going to tell you about a unique one involving PayPal that a reader recently told me about.

Robert, a New York guy, tried to sell a very expensive Breitling Swiss watch. Because he wanted someone to buy it locally for cash, Robert listed it on Craigslist.

Yes, I know, there’s a lot of nonsense that happens on that site. But that’s not where Robert encountered his problem.

“You’d have thought I’d thrown bloody chum into the shark-infested waters,” Robert said. Even though he purposely posted the watch at a price that was much too high, he got a lot of interest.

“As soon as I put it out, I was getting … out-of-state area codes. I was wondering, what is this all about?” Robert told me by phone.

But the buyers were all far away. So they suggested using PayPal, which is a common way for buyers and sellers of goods to arrange payment. One wanted the watch shipped to Florida. Another said it was for a friend overseas.

Robert says he’s used PayPal before but never on the seller side of the transaction. He was always buying something.

Someone offered to pay Robert $2,700 even though he was asking for only $2,500 — but the money would be sent to his PayPal account. “He said, ‘I’ll put the money in your account and, when you see the money, you send (the watch) to me,’ ” Robert said.

The buyer asked for Robert’s email address and said that once he got a confirmation from PayPal that the money was in his account, he could ship the watch. “Boom, I got a confirmation from PayPal,” said Robert.

It looked totally legit. So Robert prepared to ship the watch.

“Just before my wife took the package to the post office, she insisted that I call PayPal to confirm this transaction,” he said. “No funds were transferred to my account — just the bogus email and fake logo.”

“This was not the only bite I had on my watch,” Robert said. “At least five other out-of-state texts came to me looking to transfer funds in the same manner as the first one that almost caught me,” he said.

PayPal warns against scams like this. And thank goodness for suspicious wives. Now you know.

The Federal Reserve’s policy committee meets again this week and everyone is expecting more of the same — no rate hike but a threat (or promise, depending on your viewpoint) to raise rates in the future.

The Fed is in the same bind it has been in for years. It needs to raise rates, but it can’t because economic growth is too slow and we might go into a recession if borrowing costs rise.

As singer Paul Simon said: “It’s the same old story.” And unless Washington and the Fed wise up, our kids will be singing the same tune 20 years from now.

Gasoline prices should soon be coming down.

You haven’t noticed it yet because the rest of the media are too busy doing Wall Street’s bidding by focusing on how much oil prices have climbed.

The price of gasoline futures, however, has been declining pretty nicely since around Memorial Day, which is the start of the so-called “peak driving season.” That’s when gasoline is supposed to skyrocket — or so speculators hope.

The only problem with that theory is that gasoline was priced yesterday at a little over $1.53 a gallon on the July futures contract. Back on May 24, the price peaked at a little over $1.67 a gallon. On Monday alone, it fell 1.5 percent, mainly because traders know the world economy still sucks.

My God, someone must have forgotten to rig that market?! Traders will have to get right on that.

That drop should soon show up at the pump — punching a hole in the idea that gasoline is somehow in shorter and shorter supply.

Speculation is another area that the next president needs to look into urgently.

So we now find out that the terrorist who killed and injured all those people in Orlando over the weekend made pilgrimages to Saudi Arabia, our friend in the Middle East that always seems to have a connection with bad people like this.

The Saudis either need to stop fostering terrorists or the US should make sure that the price of oil goes down and down. How? Washington should subsidize domestic oil production, especially shale oil, until the Saudis start to squeal and cooperate on terrorism.

Right now, we have the leverage. If the Saudi royal family doesn’t want its oil revenues to collapse, then it will cooperate.

The media picked up on the fact that Hillary Clinton was wearing a $13,000 dress while giving a speech on income inequality.

Her problem isn’t that she spends money. The problem is where she has gotten her money, something I’ll be dealing with over the next few months.

Donald Trump, to be sure, is no angel either. You can’t be in the construction business without getting your hands dirty. I just haven’t been able to uncover his devilish ways because people who know him don’t want to talk.