Buy it from an Authorized dealer. While issues with the remote are rare, if you do have an issue a warranty would be nice to have wouldn't it? You only get a warranty from authorized dealers.
Also, Unless there is a distributor near you with MX-700s in stock, you won't find any. They have been discontinued. Look at the MX-850 as it is the replacement for it and is an awesome remote that allows both IR and RF control.
Justin