There are a number of options one can take if you do not wish to pay the price asked by those offering glamour services:

1. Wait for the prices to come down.

2. Level the crafting professions yourself. It takes some time, some gil (and I need to use the leves, I keep forgetting about them).

3. Befriend crafters in your FC (or friends who may be crafters) and offer to bring the materials they need in exchange for their glamour services.

4. Don't get your gear glamoured.