Short story, I sold the Mechanist's armor to a caravan and then entered the Ant-agonizer's lair. Can I get it back?
Long story, I was scavenging when I came to the town where those to guys whose names I find too long to type again, have their fight. I went for the Ant-agonizer first then realized her lair was ridiculously close to the town, so I did the Mechanist's hideout first, used a successful dialogue option and he dumped his suit on me. Overencumbered, I dropped the heaviest thing in my inventory(His suit), used the grab button so it was just floating in front of me, and high-tailed it to the town's merchant. They don't have one. So I waited for a caravan, sold my non-essentials(his suit and helmet included), and began the Ant-agonizer's Lair.
She says she won't talk to me until I have the suit.
Can I get it back?
Best Answer
The traders use a fixed route, so if you go to one of the locations below, wait for the first caravan to show up and see if they have the Mechanist's suit in their inventory. If not, wait 2 hours in game time or use the 'select' button to wait. Repeat this until you have checked the four caravans mentioned below.
If this doesn't work, I would assume that the items are lost forever in the wasteland I'm afraid. There is no information on whether the trade caravans retain sold items, but given that the normal merchants seem to, I'd say there is a good chance that the trade caravans also do.
Source: http://www.supercheats.com/guides/fallout-3/trade-caravans