Okay so theres this guitar some dudes selling on ebay for ten bucks. Only problem is it doesn't have tuning pegs. How much would it cost to replace these?
Not much. Considering it's $10, just buy it, because even with the pegs, it'll still be cheap.
Yeah problem is shipping costs $20 and I don't wanna blow $30 bucks on a piece of crap (wow i sound cheap)
Tuners can cost anywheres from $20-$100s of $$$, all depending on the quality; I think you can get some good quality ones for around $60-70. Maybe less if you know where to look, those prices were based on Musicain's friend.
If you're only paying $10 for the guitar, is it really worth it to spend more on the tuning pegs and shipping than the guitar? I'm pretty sure the guitar will be near unplayable.