I 'm planning on selling my watch collection and i would like to offer the possibility of paying in bitcoins, even at a lower price, since I will use the money to buy them anyways.

Also is more attractive for me to get paid this way because I don't have to worry about maybe having to explain to the authorities why I have four or five transfers of couple of thousand each, from different guys. I run a little business and they could interprete it being another income from my activity and if I have to pay taxes as a profit, they rip me off 23%.

It can be also more attractive for the buyer because that way he can't spend some BTC without converting to fiat and saving from paying taxes.

The problem is, the buyer is completely unprotected after sending BTCs, so it's normal that people won't take that risk. Police could easily find me if I receive the money on my bank account and them scam someone, but with BTC I can just disappear.

How can I make it safe for the buyer so paying me via BTC it's attractive?
I have checked scrow services but they either don't accept cryptos, or look sketchy or charge like crazy fees 10-20%, and there are also a lot of scams apparently via scrow fake agencies which makes just not worth it.