I had the harley dealer change my back tire once... they made the tranny leak and then told me they could fix the leak for $1,500 - so I guess that would be even more expensive than your dealer
I order my tires off the internet - no tax - free shipping... $225 for both tires.
I take the wheels off myself - no one touches my bike but me -
I bring my wheels and new tires to the wheel works shop - 60 bucks gets them mounted and spin balanced.
I bring the wheels w/new tires back home - polish them up really nice - clean the inside of the fenders - check the brakes, do any maintenance - then put the wheels back on the bike.
Takes me one full day - I sleep real well at night knowing the job was done right.
Sometimes its more than what it costs - its the way the job gets done.
I enjoy working on my bike - and I love riding it knowing that I did my best.
For what the dealer costs you can go out and buy a nice lift/jack - the shop manual - any tools you might need and even some cold beverages - kick back and get 'er done.
Here's my story - and - I'm sticking to it!!
http://www.harleyridersforum.com/viewtopic.php?f=57&t=1299&start=0&st=0&sk=t&sd=aAnyone that needs any info - PM me and I'll do what I can to help.