IMO if its a nice, good condition and the buttons arnt crap, Harris Tweed's sell on eBay decently (if its a 36S send me a PM), but just dont expect to make $80 flipping it unless you want to sit on it for months. Take your quick $20-40 and be happy. When I pick them up they are $3-7 and you really can't lose money flipping a nice Harris Tweed in that price range.
eBay dosent scare me, but it does suck and the fees suck big time! Unfortunately I have had little to no luck selling stuff on the forum since we switch over to this new format so 95% of the things I have sold have been though ebay. I would say 1:20 items I have some kind of problem, but just bite the bullet and take the hit, usually just getting stuck for shipping. If you follow the ebay/paypal rules to the "t" then I have never really had any fraud problems. Also only ship to confirmed address, use tracing, signatures and insurance when needed, etc. I also don't accept offers (as i do mostly BINOBO from people with 0 or lower feedback and check feedback history both for them and what they left before accepting offers. Again, just my opinion but if the Tweeds are nice and you want to flip them for a few bucks they are better then most of the crap you will find thrifting and I dont see much issue with fraud to flip a $40 jacket.