Buy your base malts through bulk buys. There is at least one in your area
Then get your specialty malts, yeasts etc. at your LHBS. Shopping around for one who has better prices may save a few extra bucks. Some online vendors have good deals too and combined with free shipping it may work out just fine.
Shipping liquid yeast, particularly in the summer is not a good idea. Even a cooler pack will not last in a UPS truck for more than a couple of hours, at best.
For all your liquid yeasts, make starters. It will prove its viability and ramp up the cell count to pitchable rates. Otherwise you may have to pitch 2 packs or vials, sooner or later.
Yeast is a relatively large portion of the brew cost at $7.00 a pop. You can reuse/harvest/wash/store yeast, but only if you can be meticulous about sanitation and sterile methods. It can also ruin a $25-50 brew just as easy or turn it into an unintended sour.
MO is usually priced at a premium at the LHBS. Mine has Muntons MO priced at $1.90 a lb (for 5 lbs. and over). Thomas Fawcett's Golden Promise is $1.88 at that quantity. I can get a whole sack of MO at a bulk buy for $50-60, and it used to be better than that
LHBS make good money on hops. It maybe good to buy your most used hops by the pound from the known hop sources. Starting next month they're selling the 2013 crop. I bought hops from Hops Direct for $10-15 a pound on average, depending on varieties and total shipping cost. At my LHBS I couldn't even buy 6 ounces for $15.