to buy or rent is a good question.. depends how much you will use it.. last i checked at
mt whitney rangers station they were renting for $5 a week or something like that.
To buy them.. prices range from about $65-$80 before tax.
if you only do about 1-2 back pack trips a year into bear country it might be better to rent..
but for me i like the convenience of owning one.. i also use mine on road side camping trips into the sierras (bear country) make sure you take it out of your car..ha
I even take mine sometimes on day hikes into areas that have a lot of bears.
I like the clear bear vaults or the Garcia. (both are close in price)
I have the black Garcia and really like it..very easy to open and yes its a little heaver then the BV450 (about 11 oz more) but it also holds 174 CU more space too..
but for me the big thing was having at least 10 bears over the years being unable to open or damage it.. im sold on it..
I also use it as a chair...ha
i personally dont care for the ursack system as you still have to hang them and I go to a lot of tree less places in the sierras.
here's the ursack site.. its still not ok for parts of the sierras such as yosemite NP.
http://www.ursack.com/ursack-update.htmfrom the REI web site: here's the specs (all are between $65-$80 )
Garcia (black can)
2.12 lbs
12 x 8.8 inch
614 CU or 10 Lt
Bear vaults
BV 450
2.1 Lbs
8.7 x 8.3 inches
440 CU or 7.2 Lt
BV 500
2.9 LBS
12.7 x 8.7 inchs
700 CU or 11.5 Lt
Counter assault (Yellow can)
3.10 lbs
9x14 inch
716 CU