I have a Nady that I've had since the 80's, it's still going, considering I don't like them and just chuck it in a bag for ages then get it out to see if it still goes, and it does. Still don't like 'em.
the sennheiser's are a little more than 300 but they're probably the best around. i use a ew100 and it hasn't failed me yet. i use it a few times a week.