Price is base on market demand. Once in the past used Proton Satria was more expensive than new unit, many new gen people not aware of it.
Anyone offer any price for the car they wanna sell, and you think it is too expensive but you want it, just contact the seller and offer a price. Tell him/her this is your offer and if wanna deal can contact you back. example like you think an AE86 only worth RM12k, then you can offer the seller RM10k and probably max RM15k. If the seller wait for years and can't sell off his 86 at RM40k, probably the desperation will force him to contact you. So you can save up RM25k. I know a lot of people jack up the car price not according to market demand. So probably you can try this and it is good that can find a few friends to offer the seller at different prices but all also +-30% below your offer. This is one of the way of "counter attack". Of cause, provided no one wanna buy his car at that price.
To be honest, RM40k cash for an AE86, I rather use it as downpayment for an Elise which guaranteed to have more fun.