Should I sharpen or replace my table saw blade?
It's probably more economical to replace blades than sharpen them in your case. Sending blades out to be sharpened makes more sense for higher cost blades. Forrest's, for example, start around $100 so paying $30 to have them sharpened is quite a big savings over replacement. High quality melamine blades and stacked dados are even further into nosebleed pricing.