"That bad" in what sense?
Just to be clear. Was this the same used watch from the same vendor with one price in store and a different price online?
If it is I just suspect they were trying to remain price competitive in the vast online market. If this is the situation I can't blame them, if they were listing their watches online for bricks and mortar pricing they would never sell a single watch.
Under normal circumstances I try to support local businesses as much as I can even though it may cost a bit more. I think having a vibrant, diverse independent business community is extremely important. That said, watches are a bit different. The mark up is often so enormous in bricks and mortar stores there's just no way to reasonably support them with my business. $10 here and there to buy local is very different than a $800 spread on a single watch purchased online.
It's too bad, because what happens is the little guys close down. The local shops contract the product lines they carry and the consumers lose out.
My wife always laughs during sex, no matter what she's reading.