Quick Question:

How much can I expect to pay for new shocks and struts on my 94 silverado?

Depends on what kind you want. You can get brand X shocks for $15 each on sale, or you can spend $75 on up for good offroad shocks. Trucks use springs, rather than struts, and don't really need replacement unless they break. Depending on the details of yours, I'd expect between $100 and $150 for stock height leaf springs. Torsion bars or coil springs (depending on if it's 4x4) I don't know the pricing on.