I've sold a lot of comics and had far more luck with auctions in the past. It seems to be bidding wars that get the high prices. (And, as the prices tend to be unpredictable depending on who's looking at the time, I think it's the best way to get the fairest price) But that's just my opinion, of course!
You'll definitely get more for them individually than as a lot - I bought a lot of 180+ comics for £106.00 including P&P a couple of months back. Just sold 46 of those comics individually for a total of £276.00 last night! (Not a bad return, considering the issues I kept also completed my collection!) But I do understand the lack of free listings on eBay and wanting to use up fewer 'slots'.