Are you local to the OP?
I'm fairly close to Greg and while we don't have the inventory of 219 and 428 stuff that he obviously does, I can assure you we have all the 35 gears anyone could want - from 52 to 90 something -- (we get some crossover sales to jr drag customers as well.) Not only do we stock different brands of gears, but different series as well -- skip tooth, standard tooth, ultra-light sprockets, premium quality, and discount/import quality. Then there's the stockpile of used gears that we've gotten on trade-ins. Remember, one gear does not satisfy everyone. Some customers make their purchases based on price alone, others on quality and performance. I can assure you our sprocket/chain inventory will go over $1500 without much counting.
I can guarantee you that if a shop only stocks 60-69T 35p gears, they will miss out on a lot of sales. Tell one customer that you don't have a 56T sprocket in stock and he will take his entire shopping list to your competition. Now you not only lost out on the sale of one particular sprocket, but plenty of other items that you may have had in stock. This market becomes even more competitive when you throw in mail order companies. Definitely a tough business to be in. I wouldn't quit your day job anytime soon, but my family has managed to make it 25 years now as our sole income. The last few years has been lean at best. It seems like we're working twice as long to make half as much.
With the economy as unstable as it is right now, the immediate (and longterm) future for our industry is uncertain at best. If I had to start all over again today, it would take a serious amount of thought before I'd just jump in head first like I did in 1989! It might require a psychiatric exam (or two.)

There's still something to be said about doing what you love day in and day out.
Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cuts
www.CarlsonMotorsports.com
765-339-4407
bcarlson@CarlsonMotorsports.com