The current value of a standard 65-note push-up piano player is very
low.  They can be had for well under 100 GBP.  When it comes to variants
it is much harder to estimate a value.  There are very few 88-note and
88/65-note push-ups around, but rarity does not necessarily mean
valuable.  Something is only worth what one person is willing to pay.

I have heard of an 88-note push-up being worth over 1000 GBP, but
one in need of a full restoration may be 'worth' much less than that.
It all depends on how much you really want something and how deep your
pockets are.  Maybe Randolph will tell us the asking price and give us
all a good laugh!

My advice to Randolph is to start negotiating at around a few hundred
and be willing to walk away.  That way you will find out whether the
vendors are really interested in selling or just wasting your time.

Nicholas Simons, GB