Boston pinball shows a high price of $1500, average of $433. Keeping in mind they're Ebay prices...and the average without Min/Max values is only $346.
Without good pics, nobody could really say...but given your description of "Collector restored" at least $800-$1000?
FYI Rarity isn't an indication of value. There could be 175 made, but if nobody wants em...they aren't valuable.