Do NOT contact the past customers of other sellers! It's morally wrong, and I consider it SPAM. Every now & then, sellers contact me offering me a better deal on a gig I've already ordered from someone else. I don't care how good the deal is, I hate spam and I hate when people try to steal customers from other hardworking sellers. When I get messages from poachers, I respond back and then immediately click "report".
If you want to make sales, go about things the right way. Advertise!
If you want to make sales, go about things the right way. Advertise!