From your previuos post, that dates your globe to a 40s-50s time period, I would say a short computer pump, sometimes refferred to as electrics. Tokheim 39, G&B 96 for example. These should be easy to find, and affordable, as they are common pumps. I once got a Southwestern 45, for a case of beer, even this pump would work for you.
Southwestern 45
Talls are within reason of the time frame. Clockfaces and visibles would be less likely, but I doubt that one could say impossible.
Tokheim 39A
I would suggest getting "An Illustrated Guide to Gas Pumps" by Jack Sim. You can get this here at our bookstore on this site. (Jack also frequents this forum.) Not only will this book give you an estimated value, but it will also give production dates of most of the pumps. This way you will be less likley to get a pump that is too new....
As far as cost, a lot of factors play into this, desirability of the pump, condition, completeness.... Just like buying a classic car, poor overall condition, and missing parts, could end up costing more than a complete unit.
You might want to check out our "For Sale or Trade" forum...
Keep us posted.