So easy to be taken in. It's not unusual.
We are trying to sell a vehicle and various other small items. We have had someone claiming to want the vehicle and can we, not him, do a check online with a company using his link. It is the buyers responsibility and also, you should use the .gov DBLA site for vehicle checks. The link will seem legitimate and you only need to give bank card details to pay for the vehicle check. We blocked and reported once we realised it was a scam. A few minutes later we had another similar enquiry. Another is that someone asks you to keep an item for them as they are working and cannot collect in near future. They then say they will send the cash via a courier service; the courier will give you an envelope containing the cash and you give them the goods. Once you agree, they will tell you that you have to pay insurance which, of course, involves you giving bank details. Again, any expenses are the responsibility of the buyer. The other one is they will pay up front by PayPal and their nephew, daughter aunt will collect. Each one will start by asking if the items still available, not the shoes, vase or books etc.
It gets a bit wearing after a while. So.many scammers out there.
The good news is that the vehicle is being collected today by a legitimate buyer. The other smaller items are are still for sale.