Ye olde comics Blog
Dutch comics only fair slightly better, most, even hard covers in excellent condition, still go for a relative pittance.
If I had the time, I'd sell my collection either through bol.com, which now, just like Amazon has been doing for years, allows customers to sell their own second hand goods through their site, or the well designed catawiki.nl, where prices are really way to high, meaning it would be easy to undercut the 'established' shops.
All I'd need is time. Which I don't have.
I got rid of my Kuifje (Tin Tin for most) comics, Lucky Luke, Trigie, Storm, both by Don Lawrence, the wonderfully surreal Philemon (visit this fansite to get an idea), my collection of Moebius, the quite funny but aging Vuillemin and a number of individual comics.
American comics I got rid of included Terminator, Aliens, Predator, Lobo and a host of crossovers.