£100 is too much imho.
I had a 48 in the day, and I was a Speccy crusader and would not hear of any pretender to the throne. Speccy was King!
I have a 128+ now - that's the one with the built-in cassette player, with the dedicated monitor (a bit of screen burn now, but who cares - I use a massive WS telly now

) and loaded up with a laptop hard drive, a compact flash to PCMCIA removable "hard drive", a CDROM and two floppies! It's great fun playing my old faves and my wife and I regularly play Deluxe Galaga in two players at once mode (of which a Windows version is currently being written by Edgar Vigdaal) with it plugged into the big telly.
So I won't be shelling out a hundred quid for this - but can see why others might.