Toby,
In my experience with shops as far as teasers and rigs go I'll usually pickup a teaser here or there depending on what I've got of my own.. Alot of the time it's easier to pick something up at a local shop if it's a pattern of local baitfish or if it's just a color the fish have been keying in on.. As far as hardware on rigs.. I think that the quality of product can make a difference from landing that 50lb cow or snapping off due to a half assed tin plated hook. I use fluoro and tie my teasers with decent hooks. I've purchased some teasers that have rusted up and have fallen apart after 1 or 2 uses... Either that or they simply don't hold up under the pressure of larger fish... I've had that happen multiple times with mass produced teasers.... So, without rambling anymore
to answer your question yes I would buy well tied teasers at a local shop if they were tied with quality components. I wouldn't mind spending the extra cash to have a teaser/rig that I know will hold up under pressure and will last.