Put it in your watch list, continue to browse at others or investigate that particular item.I don't know what your preferences are for planes, so don't necessarily think I have the final word on it's value to you - just one man's opinion
Figured I would chime in here.. I am selling one on eBay right now. Estate sale find No. 71 with depth stop and a blade. Knobs are nice too. my ebay name is toolmanaz. Don't know if it will sell below $50, but you can try.$40 is as high as I would go for a 5. You have to be careful though. Pick up one or two and the next thing you know you're trolling for specialty planes that start higher than that.
Currently hoping to score a router plane that will need work for under $50.