Help Selecting New Intake Boots

Hi Everyone,

I'm still pretty new to working on bikes and need a little help. My intake boots are cracked on my '78 XS400 (2L0) and I need to replace them. I was looking on eBay and found these:

http://www.ebay.com/itm/78-79-YAMAH...110-/400849208702?hash=item5d5479857e&vxp=mtr

Are these worth anything? Where should/can I be getting replacement boots?

Thanks for your help.

They look fine to me; you just might want to shop around and see if it is the best price.