what is the value a 2dollar 1928G "E" red stamp in mint condition?

Question

monticello series of 1928 G red stamp

Answer 1

Somewhere between $2.25 and $50, depending on condition, among other factors. the note would have to grade Choice Uncirculated to be more than $10.
When you say "E" red stamp, are you referring to the first letter in the serial number?

Here is the link to a listing of all $2 Series 1928 G banknotes presently for sale on eBay.

http://search.ebay.com/search/search.dll?sofocus=bs&sbrftog=1&combine=y&fcl=3&from=R10&ftid=2&fcd=1&satitle=1928+g++%242&sacat=40028%26catref%3DC6&ftrt=1&ftrv=1&saprclo=&saprchi=&fsop=1%26fsoo%3D1