Hello all, I have two models in its, I would like to have an estimate of its Walkman to put them on sale on ebay.

The PX1000 is the most interesting. Boxed in mint condition it can go for about 400 euros or more.

The PL505 it's also very interesting and rare, but it can go for much less: about 80 euros, depending on how do you list it.

List them all for .99€ and let the market give you the best price. Good luck!

You should have no problem getting a good price for the PX1000, but from experience in watching these, usually sellers are punished with low interest when sellers start with high opening offers.