Well, if you've sold over 500 things you're going to encounter instances where people do chargebacks. Without dc anyone can file a chargeback and win, no questions asked.
[quote name='mastertard']i've sold over 25 games on eBay and i've found that optional insurance isn't really a big difference maker (or offering refunds, surprisingly - although i always keep my games in mint condition and make that clear to the buyers). i've offered optional insurance and free delivery confirmation for the first half of games i've sold and i haven't really seen a higher profit because of it (or a decrease in expected profits).
good communication and good feedback rating is a plus. people definitely trust you more with sellers who communicate well with their buyers and with people who have high feedback %.
also, even though a thorough detailed description sounds like it would help, from my experience it doesn't, just keep your stuff simple and straight to the point, it seems people don't want to read too much.
about the shipping cost thing, it is hit and miss, sometimes you will have somebody ignore the shipping costs, and a lot of other times you won't. usually, it doesn't matter much because the cost of selling + the shipping costs usually add up to about the same. smart people who know how to use eBay usually look for shipping costs that arent too high (i think). when you go to list your item, it'll tell you what the average shipping cost is (if you use eBay's UPC product database).
it is my opinion that reserve discourages buyers at times because they're not sure if they're going to get what they bid for (that's just my opinion, though). items sold history, like someone mentioned above, is a good idea of where to get your approximate selling goal.
about the $0.01 start of auctions, that works fine, but there were a few times i actually sold for a lot less than the usual cost because of it... my only explanation for this is people possibly think it is cheap quality? i'm not sure. make sure you check ebay's fee charge for initial starting bid price, as it is different according to how much you start at ($9.99 and $24.99 are good starts depending on how valuable the game is). $0.01 starts for popular games get more bids but usually sell for about the same as higher starts (although there is a bigger fee, something like $0.15 or $0.20 more). i think buy it now is lame, i rarely see anybody pay via buy it now unless it is clearly a good deal or the game is brand new. it is just a way to get charged more fees, i recommend against it (unless you really want to get rid of it).
also, another reason why i chose not to do insurance/delivery confirmation is because you have to wait in line in the post office to do it (at USPS, anyway). whereas, if you only charge shipping costs (I charge $4.25 for shipping via priority maill; the actual cost is $4.05), you don't have to wait in line, you can just get a box and package it and dump a bunch of stamps on it and hand it to the people at the counter without waiting... what's even better is if you pay for priority mail, you can get FREE shipping boxes/envelopes and FREE tape to use. without waiting in line (sometimes, the line in my local post office is 20+ minutes).
at my post office, there is a vending machine where you can pay $4.05 to cover the priority mail cost... then just grab a free box, put the addresses on, stick the stamps, and use the free tape. takes only a few mins. also, for packaging inside that free box, crumbled newspapers do just fine.[/quote]