Adding to JGs suggestion, which is probably your best route, and depending on your ability to set them aside for awhile and wait, that could work. It's things that someone could eventually be looking for, not that everybody will be wanting one right now. Once you get your craigslist ad written and posted, they're easy to renew and repost, you're only a couple of clicks away from renewing the ad. Ads like this don't need to be on top of the page to be seen, because it's an item that when wanted, people will be searching for(not that it must be in front of their face, they will be digging to find it) It's worked several times for me, while not using ebay has it's drawbacks, you can still sell items like that over time. People don't look at it as a come on or something, as they would say a solid gold rolex for only 29.95, and I can insist on a USPS money order up front(which offers fraud protection for both the buyer and the seller) that can't be revoked with a simple complaint to their credit card company and then I've lost my item and paid their shipping(they must have a valid fraud complaint in this case). If you list them in San Antonio area, you'll eventually get inquiries from anywhere in the country, from people who are looking hard to find that one particular item. I've had people email about listings I'd all but forgotten about, from anywhere in the country, pointing out one item in the corner of a photo, saying, "I need THAT!"
In case this isn't something you'd even want to think about, at least they should be small enough to load in the car or truck, and take to someone who can evacuate them and recover the coolant, so you can tear them down and scrap em
At least there's two choices, as the saying goes, your mileage may vary, just depends on which way you want to go with it