Think you need to keep on checking ! You should check old and recent auction sales . Go to some shows et’c. Like everything else there is a high middle and low price depending how bad someone wants it . I believe your projected value is off . But that’s just my opinion . Big auction house prices are not a good indicator of true value unless it is a rare or high demand item. Certain attendees at certain auctions get juiced and throw dollar’s at items quite often inflating the prices. Research on items that i find are part of the fun of collecting .Thinking back when I was new to this hobby old Dick Bennett would lead me to the edge but let me do the leg work to gain the knowledge and answers i was looking for . Miss him ! Good hunting to you .