Obviously, that's your call, but I find there's a lot of emotional investment tied up in my old A1200T, given that I've had the base A1200 it's built from for 19 years. I doubt I could easily part with it 
I think you could

When I was selling my A1200 8 years ago I thought it could be missing it.. so many memories were with my BlizzardPPC and other Amiga gear. But in the end I got more money from my Amiga 1200 than I spent on NG Amiga system. There was no reason to use old Amiga anymore when new system was so much faster and AGA demos didnt run on RTG anyway.