Well, dh and I just usually sit down and look over our budget when 1 of us is looking for something new, that would be considered a "big ticket item". I never "have" to ask for permission to buy something, same way with dh to me, but it is just common courtesy to discuss a large purchase, imho. We also know what is really important to each of us...mine is quilting, dimensional embroidery and beadwork...his is fishing and hunting and working on "their" classic car with our son..So, that is how I would go about it...That being said I have to say if there is something I want, I usually get it...sometimes it may be better if dh wasn't so accommodating...hmm...nah...lol... If you have the $$, and it won't stretch your budget, that would be a good thing to bring up to dh...also the fact that usually one gets what they pay for...hopefully you can find a great deal on one...Hey! Call it an early Christmas, your birthday, Mother's Day, Happy Halloween, etc...gift....lol..
Good luck to you!
Kif