Bought mine new, almost 20 years ago for £500!

Time moves on and I'm thinking of retiring it - but not selling - so it can become a home only unit. I don't think I'll ever go down the multi FX route again but the GT-5 has certainly been a useful piece of kit.
For reference, I always use it 4 cable with my amp and never use the preamp/cab sims. At home, I use the preamp and cabs for easy and quiet jamming/rehearsal/writing. It may lack the tonal finesse of newer amp and cab modelling gear but for the time it was hard to find an equal, and for the most part, the effects are - IMO - as good as anything else out there, and in many cases, better. One exception being the Harmonist, which was really disappointing, compared to an older, much cheaper Zoom unit I had. Oh, and the Acoustic Sim, which is plain horrible.
