Here's my two most expensive watches, the one on the left, a TAG Series 1000 I bought in the early 80's, cost £250, and I've had three batteries replaced, along with the face, after the retaining pins dropped off, cost over £100, around twelve-fifteen years ago. A new battery is at least £30, if you take it to a TAG dealer.
The Seiko SPORK cost me £350 last year, new with warranty, (discontinued model) mechanical automatic, so no batteries. I never wear the TAG, the Seiko I love, and is what I wear everywhere, except to work, to avoid damaging it on machinery. The nearest watch that TAG do to the Series 1000, is at least £1100 now, and I prefer the Seiko in just about every way. A really good watch doesn't have to max out the budget.
 Before anyone points it out, I know the TAG is an hour slow, I never bothered to put it forward because I don't wear it).