If its one of the last 100% ICE supras then I dont see why prices wouldn't go up over time. Who would think old 90s early 2000 MT cars would go up in value in the last 5 years, but they have.
That depends. Usually modifications don't add value. However, if you find the right buyer looking for the exact same mods they may pay the premium for convenience.
Special editions as of now don't command much over msrp if anything at all ie launch edition and a91 edtion (2021). Maybe the...