You wont find one on ebay for £60-£80.
I have 8 PS3's here on 3.55 at home, the reason is simple I got the downgrade bug, once I did one ps3 using e3 flasher I wanted to do more because it gave me a kick. I did brick two though !
Problem is now I have all these playstations on 3.55 that I need to get rid off, I suppose I will have to put them on ebay soon but not for £60-£80 that's just silly when I paid more then that before they were downgraded and not only that ebay are rip off bunch of ba*tards.
if you really want one I will send you one including postage for £110.