any suggestions on value or where to look for a value

I came across this coin recently and purchased it. i thought I was making a good deal to resell but even my local coin dealers say it isn't their specialty and do not make an offer. Basically I have no idea what it is worth and the guy I bought it from said he paid around $150 for it.

What do the reverse sides look like?

that is the front and back of one coin

Here's a duplicate of your coin:
 April 68 - 15 January 69 A.D., Roman Provincial Egypt
Minted during a less than two month period from 9 June to 28 August 68 A.D.
Billon tetradrachm, RPC I 5326, BMC Alexandria 199, aVF, weight 11.268 g, maximum diameter 23.2 mm, die axis 0o, Alexandria mint, 9 Jun - 28 Aug 68 A.D.; obverse LOUK LIB SOULP GALBA KAIS SEB AU, laureate head right; reverse ALEXANDREA, draped bust of Alexandria right wearing elephant-head headdress, dated LA ( year 1 ); scarce; SOLD 
You may wish to contact the sellers (at the source below) for the coin's sales price.
Don.......

Source (#22957 with pic): http://www.forumancientcoins.com/ca...05&pos=10&iop=30&sold=1

Here's a duplicate of your coin:
 April 68 - 15 January 69 A.D., Roman Provincial Egypt
Minted during a less than two month period from 9 June to 28 August 68 A.D.
Billon tetradrachm, RPC I 5326, BMC Alexandria 199, aVF, weight 11.268 g, maximum diameter 23.2 mm, die axis 0o, Alexandria mint, 9 Jun - 28 Aug 68 A.D.; obverse LOUK LIB SOULP GALBA KAIS SEB AU, laureate head right; reverse ALEXANDREA, draped bust of Alexandria right wearing elephant-head headdress, dated LA ( year 1 ); scarce; SOLD 
You may wish to contact the sellers (at the source below) for the coin's sales price.
Don.......

Source (#22957 with pic): http://www.forumancientcoins.com/ca...05&pos=10&iop=30&sold=1

NICE COIN!