For a town built mostly in the 1980s and 90s, we stock the parts that match that generation of hardware: chain-drive sprockets, standard safety-sensor pairs, and replacement logic boards for the brands most common in houses from that build window. We also carry basic belt-drive parts for the newer installs and replacements that have gone in since. What we don't carry is every obsolete board for every opener ever sold - some units from the late 80s used proprietary boards that the manufacturer stopped making years ago, and for those the honest answer is replacement, not repair, because the part simply does not exist anymore. We'd rather tell you that on the phone than after a wasted trip out.