Unlike what some suggest here: do NOT use public sources as reference points for salary negotiations. Virtual all of them come up with average salaries that are

Unlike what some suggest here: do NOT use public sources as reference points for salary negotiations. Virtual all of them come up with average salaries that are way, way lower than what most good developers could earn. I strongly suspect these sites are being gamed. Either that, or the numbers are based on surveys that are mostly filled in by people that are worried about being underpaid (guess what, that means they probably are).