Just wondering where you get supplies and materials from and the pricing. I like smooth on but sometimes I go through gallons of silicone on a project and I ain't a rich man. Think starving artist type. I see a guy on eBay selling tin cure 25 for $396 for 5 gallons and free shipping. I bought a gallon from him for $120 to test it out and it was good quality. Any other good deals out there?