Well to answer the questions in order, I think that:
A your one around £400 give or take £25
B A nice POTF around £275 maybe a bit more for graded.
Could I just add the following thoughts...
Unless you want to release some cash I would stick with the one you have, you see more POTF for sale than Tri Logo.
Your Tri Logo appears to be in fantastic condition, I do prefer the Han on top of the block on Tri Logo’s rather than hidden under the block on POTF one’s, personal choice I know.
I am trying to put the last 17 POTF run together (with the exception of Yak and Anakin of course
) because I prefer the POTF cards, but this is one that I think is better in Tri Logo, again only my opinion.
Let us know how you get on, good luck.