You're brand new to the forum... 3-10-17 so I suggest taking a look and searching the forum using the tools provided to get some idea what collectors on OG are willing vs the crazy prices people may as.
Not sure how many people are into the really tall poles since the concrete blocking and need for a crane to put them in place are cost prohibitive to all but a few deeeeep pockets not to mention irate neighbors if you have a sign so high in the neighborhood!
The sign value is dependent on condition, fading, cracking, working order. Without knowing those it might be worth $250 or $500. Did you check fleabay for similar in your area. We have regular squabbles of value because in one part of the country these are worth more than others, especially the light up signs.
Checkout my items for sale on Pauls Picks on Facebook.
Collecting anything keeps you young at heart!