I see such beautiful bling trim on cakes and would love to know where to find a reasonable supplier. I found this site on a search.
http://www.decoratingstudio.com/Wedding_Bridal/rhinestone_banding_24_row_12_row_6_row_wide.html

Is this a good price?

That's a cool site but I have no idea if it's a good price, sorry!

I just bought some rhinestone ribbon (looks just like the pic from the site the pp attached) from a seller on ebay for an upcoming Wedding Cake. I purchased the 4 1/2" wide ribbon and will cut it down to 1" wide trim. It was $14.99 for one yard with free shipping. So by the time I cut it to the size I need I will have 4 yds of 1" and 1 yd. of 1/2" trim. Considering all the 1" blingy ribbon I found was much more expensive per yard, I think this is going to work out just fine.

Was it easy to cut and looked good afterwards?

What I bought was very easy to cut, I just used scissors. The wedding isn't until the 23rd of July, so haven't actually used it yet, but have layed it out with the ribbon that will be behind it and it looks beautiful together. Very blingy and glitzy.

Here is a link to where I bought mine. I was mistaken in cost, it was around $10. with 3.95 shipping. They shipped really fast too!

http://cgi.ebay.com/Diamond-Mesh-Rhinestone-Ribbon-Crystal-Wrap-4-5-1-yard-/270755531154?pt=LH_DefaultDomain_0&hash=item3f0a498992

I buy mine from Alabama Crowns. Real Swarovsky crystals.

Thank you so much HobbyCaker. That stuff is beautiful.

There sure is a HUGE difference in prices.