Used-hardware dealer customer and GPU appraisal registration

A scav-type seller visits now and then with three to five used cards. An
honest dealer sells at true value, a middleman adds 8%, a scammer mixes in
fakes (relabelled cheap chips) priced at 90% of the labelled model's value.
The markup is a client-temporary item feature, so a bought card is only
worth its real value. Cards are registered as appraisal items; the correct
value is the same function as the sale value.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/Decentralized/ModFiles/Localization/en.csv

@@ -58,3 +58,12 @@ news.open.title,Poinbase Lists PSC
 news.open.desc,The Upper Level exchange Poinbase now lists PSC against CRC. Graphics cards are in demand across the station.
 news.halving.title,PSC Block Reward Halved
 news.halving.desc,Miners now receive half as many coins per night.
+appraisal.gpu,"Graphics card"
+dealer.name,"Used-hardware dealer"
+dealer.line1.1,"Cards from a mine clearance. Condition is written next to the name."
+dealer.line1.2,"A few worked cards, going cheap."
+dealer.line1.3,"Picked these up on the road. First-hand price."
+dealer.line2.1,"See for yourself, turn them over and check the back."
+dealer.line2.2,"No warranty. Look before you take."
+dealer.line2.3,"Price is negotiable if you want them."
+dealer.markup,"Used-goods markup"