Your bag is gorgeous and I'm sure you use and love it. And that is what is important!
Many great box bags are selling for about that price- this one has some issues, but as
@audreylita said, everyone has a difference tolerance for different issues. Age doesn't automatically make a bag more desirable, despite what some may say ( not you!)
In addition, it's not only the age, condition and style of bag, but so much more that can determine a bags "worth". Leather type is a key factor- although many purport to "adore" heritage leathers ( box, barenia, butler, swift etc), they aren't willing to tolerate a scratch, or the time it takes to get to a reasonable patina. No judgement, its just a fact. Because of this, these leathers tend to command less insane prices as time goes by.
Box needs to be maintained or it will dry out, and many bags that are older look good, but will not hold up to normal use- not abuse, just normal everyday "I use my bag" use. If you can't carry it by the handle because the leather is so dry it will crack, that's a bag that won't do you much good.
Most box bags are not "in" colors ( except in my mind, in which noir is the standard to which all others aspire
). So again, box ain't pink.
And please don't start me on how social media, etc influence bag prices.
Last but not least, the market went crazy the past few years ( again for multiple reasons) and may now continue to be crazy, or may be entering a correction, so who knows what your Box beauty may be worth in the future? It will be worth what someone is willing to pay for it- so as long as you love it and use it NOW, that's all that counts.