I suggest that you get all the vendor catalogs, so you can see what MOST of the repop's that are available.
Also check Jack Sim web site & get one of his Pump Books;http://petrolianacollectibles.com
Checkout Scott Benjamin's web site on Globes;http://gasglobes.com
Subscribe to the magazines.
Spend some time & read old post [using the Google Search below is a bit easier than the search at top of page].
DON'T be afraid to ask questions.
BE WARY OF SIGNS ON EBAY FROM Argentina, India, Singapore & a few made on East Coast.