But if you want to join a good raiding guild, it should be easily worth its cost if you can afford it. It shows that you are seriously trying - something worth more to a lot of guilds then ilvl.
When you have the mindset of "nah I don't enchant or gem, I'll get better gear soon" and don't do LFR or other means to get better gear (Nalak for tier pants, Oondasta, hc-scenarios for 516 ilvl gear, quest for boots, valor gear) then you are not worth a trial.