TLDR: where I live, if you have stolen property, and did not know it’s stolen, it is still taken from you and you get nothing back. You essentially lose the item, and whatever amount you paid for it.
Not taking any sides here, but wanted to add a bit about stolen property in my area. In the part of Canada I live in, stolen property is stolen property regardless of how it came into your possession. If you can show that you had no knowledge of it being stolen, you won’t be charged. You will however still lose the property. Lots of people in my area have dirt bikes, quads, and snowmobiles. Very few people ever bother to plate or register these and most don’t have a clue what their vin numbers are even. This means only a tiny tiny percentage of these machines are ever sold with anything resembling a title. Partly because people don’t care, and partly because there is no way to even register some of these machines up here that are race only. I have sold several myself where a guy shows up, hands you cash, loads the bike and leaves. Zero paper trail. I am giving this example because it is similar to the issue here. It’s an item that is difficult to trace because of lack of serial number documentation. Your Strider looks like every other strider out there, and my Kawasaki looks like every other Kawasaki out there.
Getting to my point, I know of several people who bought machines in the exact same fashion as the rest of us, and later found they were stolen. The police took the machine, the seller, if known got charged, and the buyer lost out. The court may order the seller to pay back the buyer, but if they have no money or nothing to confiscate, the buyer just loses their money and the item. I personally know a guy who bought a bike for $5000, and upon finding out it was stolen lost the bike and the money. The seller had nothing of value for police to confiscate and auction, so there was nowhere for the money to come from. Seller was also on welfare with no income to divert to pay the guy back.