All Romances #1 on Ebay
So this will give you some comparative valuation. Brunom is a seller out of Canada - he has other Ace "Trans-Canada" books in nice shape. This copy of All Romances #1 has been relisted each month for at least 9 months, maybe longer. Brunom doesn't drop his price on the relist, nor take offers lower than 90% of the ask. I've thought about buying this book from time to time - I would if it were $75 for sure. But I like Canadian copies, most (US) collectors don't. So that makes your copy worth around - $15? $20?
On the other hand, I've never seen a nice US copy of this issue, and his and yours are the only Canadian copies I've seen. Romance - hard to price out just based on scarcity. Demand is the more important driver.
Power of the boards! That book has been sold.
Brunos'or impalers?