Over the years like anything else , harmonicas have gone up in price. The good ones are from $30 to $50 each . When you play as often as I do they wear out and go out of tune quite often , Sometimes i might play 3 or 4 harmonica keys in one night and need to service them once a month or more. It just makes sense to get as much use out of it as possible before replacing them.
I've cut down on using so many keys unless I have some special work like recording or a special show where I pull out the big guns. Most of the time I just stick to the basics with a C and a A harp.
Do you play harmonica ? If so do you have a method to service them ?