Mostly people buy tier 1 runes and then replace them with tier 3 after reaching level 20. Tier 2 runes are a rip-off. You're already pretty close to level 20 though so it might be a better idea to just wait for tier 3.
Spare your IP for lvl 20 and buy a tier 3 runepage only
EDIT: Lel, 4 answers in the same minute
EDIT: Lel, 4 answers in the same minute



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just save all your ip for runes from now on(you prohably should have started earlier) and get a good runepage at level 20 when you can buy tier 3 runes. one of the best points to buy an ip boost is at this level imo, so you might want to get one if you have spare rp.

Thanks to IPodPulse for this <3^
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I was wondering however when is the best time to buy Runes? Is it worth buying level 1/2 runes know that are cheap that I can use, which make it easier to win games (slightly) or is it better to save up IP until I have reached the level at which you can buy level 3 runes so that I have enough money to afford a lot of them? Or is it better to do a combination of the the two?
If any experienced players can give me advice on what the best path is I would appreciate it a lot! ^^