Do yourself a huge favor, bring tools, including metric allen wrenches.
Take one of those mounting bolts to the hardware store and buy stainless steel hex head bolts and lock washers.
The allen bolts strip out and are a huge PIA when that happens.

 

I picked up a used SD rack for $500 in East TN while I was visiting for thanksgiving.

I have been looking for one for years. I never see them for sale around here in the Philly area, so when I take trips to the south I always take a look on the local craigslist sites trying to find one. I came across one for sale about 20 miles from my parents in TN last month. The guy was asking $650 for it, so I called up my dad and asked him to meet up with the guy and secure it for me. My dad took a trailer to pick it up and ended up bringing it home for $500

It looks to be brand new. We took a buffer to it & buffed a little sun oxidation from the black finish and touched up a few small stone chips & we installed it when I came down for Thanksgiving. I'm quite happy with my latest find.