How many miles do you guys typically run before ditching a pair of running shoes. I just finished up a d1 career in which I got everything for free and running shoes aren't cheap!!! I read in a magazine 300-400 miles is recommended. WHAT! At a modest 60-70mpw I'll need to fork over 70 bucks every 6 weeks. This is more expensive than most gym memberships. Should I just quit running b/c it is too expensive? OH the irony, lol.