nicoley207,
If you want to use the camper for a while then it's probably worth replacing the refrig.
The cooling unit in the existing frig can be replaced if you can supply the labor but if you are going to have to pay someone it will cost about as much as a new one.
The prices you mentioned are a little high.
Take a look at the following supplier link:
http://www.googleadservices.com/pagead/aclk?sa=L&ai=DChcSEwik15yQkoHOAhVRJIEKHQ0yB1QYABAR&ohost=www.google.com&cid=CAESIeD20p4JmQM1VxwUl3LvWgVMs4756_bfiEs3wFI19YaE9g&sig=AOD64_11Bz1DVJZbpZlRLnskOXtZcpiI2Q&ctype=5&q=&ved=0ahUKEwiwyJeQkoHOAhXKuB4KHSX6CsIQuxcI0AE&adurl=
Note that PPL also offers $10 shipping so it's much cheaper than what you were looking at.
I noticed that the sale price is good through 7/22.