Steve, the problem is that T2's are falling through the floor with respect to trade in values, I sold my privately when I moved to a H1, (and got £375 for it!!!). You can currently buy a s/h T2 from someone like Cambrian Photo for £519 (inc warranty) and at the moment they have a 15% off 'used' code January2020 making it £441. You are not going to get good money trading in a T2 especially as the T4 is round the corner, meaning that there is likely to be a surge of traded in T3's when the T4 is announced.
That said they also have an X-H1 for £689 (less the offer code makes it £585 which is a bit of a steal, so if you sold both the X-T2's privately (£375 each, you would be nearly £200 up, leaves a bit of money to get an L bracket for the X-H1 and leaves a bit over)
Fuji bodies are just depreciating like a stone, and thats just the way its going to be, its the cost of change that people need to look at.