I'm fortunate to have a LHBS that supports winemaking, which has been around for decades. Other shops have come-n-gone, but it hangs in there.
For folks that have a local store, support 'em, because if you don't, they'll be gone.
I was co-owner of a LHBS from '89 to '91, and after 2 years in a storefront my partner and I decided to quit -- too much work, not enough profits. So we put out a mailing to our entire list, letting 'em know we were going out of business.
People arrived in droves, people my partner had not seen in 5 years (he ran the business out of his cellar for 7 years prior to me joining and moving into a storefront).
People asked why we were going out of business. I had to bite my tongue and not tell them that if they had spent a small amount of money on any regular basis, we would not have quit. If we had regular business like we did that last 3 months, we both could have quit our day jobs.
EDIT: If the LHBS doesn't carry desired supplies, it is necessary to order over the net. I ask the owner of my LHBS, and he can usually get what I want, but not every store owner is so accommodating.