scuwp: Wheel alignment - $80 tops.
wheel alignments should be done around every 10,000km. The small price is worth it to save the tyres.
Do you have a highly strung sports car with expensive tyres? Alignment every 10k would add another 50% to my tyre costs. I do rotate every 10k and inspect tyre wear. I save alignment for tyre replacement when the shop usually discounts the price.
When new the car had an alignment check done by the dealer at 1500km when they screwed up the toe in. That was midwinter so wasn't noticed for about 3 weeks. That was enough time to take 10k life off front tyres. If something is wrong you can't afford to leave it.