Try before you buy

Just wanted to create this topic and see if i wasn't alone in thinking this. Alot of games have some sort of Try before you buy system and i was thinking that riot should implement this in the game somehow. This is just a guess here but there are around 100 different champs in the game right now and the 10 free ones a week dont really offer that much verity because most of the time its the same champs that were their 2 or 3 weeks ago. So im saying that riot should implement a system where you pay a certain amount of ip in order to rent the champ for a day. The price will just depend on how much the champ costs. I would set it up as this.

450 champs = 100 a day. 1350 champs =200 a day 3150 champs = 300 a day 4800 champs = 400 a day 6300 champs = 500 a day

I think this would allow for champs who arnt in the free rotation to be played and for people to actually decided on whether or not they are worth buying and playing. Finally before people say that every champ gets played at some point here is a list of champs that i have not seen since ive started playing about 5 months ago. and up intill now

Edit: Im gonna edit this an add it in because of the few no votes that have been cast thinking this might be why. This system would only work for normal blind pick/team builder and the rented champs would be disabled in ranked play.

The other reason i could think that people wouldn't want this is because they already have all the champs bought and this wouldn't effect them. my only response to that is if it was a system that was put in it would allow new people who have joined to be able to try out the vast amount of champs since we weren't able to play them during release or when they were popular.