Re: I have a jetta tdi, have 500$ canadian, what to do, you decide! (vtec16)
Suspension by far. Weitec GT 30 mm will cost you about $650 CDN + tax, so that would be a stretch (if you can wait a couple weeks for that extra $, you won't regret it). The only thing cheaper that I can recommend is Tokico shocks from shox.com for $289 US. With S&H, it works out to $540 CDN + tax.
Other than that, there is nothing worthwhile in the suspension area under $500 CDN, unless you can find somebody selling their suspension parts in the classifieds forum.