wow you went and made it waaaaay more complicated, but since this isn't an "add this to the rules" discussion, that's fine.
Back to the original question though, I guess it would be up to the staff if you could sell the workshop back, since it actually does have a PP of 10g.
10g is not a gold sink, it's an inconvenience, for anywhere except a brand new/low level/low loot campaign. A year old player saying "I have 80g, because there's nothing to buy" is problematic but shows that there is a problem with many aspects of the game, and can easily purchase a 10g...
Eli, sorry, I never received your message.
Stevaan, we know that Jade, Orichalcum, Aeog, and such other materials are very effective against outsiders. Silver is good for undead, some specific materials are good against specific constructs.
"Trap door! I found the door! Someone get Tulbor. I can't open this, we need someone to open it." "Spellstrike destroy" "well that works"
Ignoring the "lets use the lore scroll" and getting the instructions 'download' for the box through (Graham) the hammer. "What are you doing?" "I got this."...