Seriously, if you want to maximise the amount you're going to get if you want to sell them (heaven forbid of course
) then you should list them separately on eBay, with a 99c start (no listing fee) for each mag. Some will sell for only a few dollars (but will still sell) and the rare ones will go for much more.
People who have tried to sell complete sets usually only get somewhere between $500 and $1000, which is not nearly as much as you should get if they are sold individually.
Last point: Be aware that postage to the USA can be quite expensive, so make sure you say that postage is extra.