SDG was not a fan of the GT-90 and 120:
The idea was good, but the execution and price was not. The handpiece is much worse than on the MX5200.
They did cut the price, but, you can get used mx500 or 5000 for half the price so its still not worth really considering for hobbyists.
This is very encouraging since I’m thinking of “upgrading” from the sp-200 to ps-900; is the “upgrade” noticeably enough to justify the extra cost, what do you think?
BTW: CxV tips are not so cheap in Europe; rather on the price level of SxP!
You'd be going from 35W to 60W, so it would be noticeable. I wouldn't pay new prices ($300+), but used prices are usually good.
If you can get something that uses SFP tips, thermaltronics makes them cheaply:
https://www.amazon.com/s?k=metcal+sfpThey also make cheap T31 tips:
https://www.amazon.com/s?k=t31+thermaltronicsBut as you say, can be difficult in Europe. In NA definitely metcal/thermaltronics is great, outside of there its harder to justify if you can't get cheap tips. Maybe if you are lucky you find a set which includes many tips.