Vintage T-Shirt Forum & Community Authentication Appraisals

I was told this might be an ultra rare shirt, I’ve had it stored for 30 years. Canadian Back Stage Pass, all over heart print. No holes at all, a bit of fading and wearing of the pattern under the arms. all the hems are intact. The pattern cuts off before the edge of the hems and doesn’t bleed over. Has the small 1993 Nirvana Brockum crisp print, a “backstage pass” made in Canada tag, XL
Any info would be great!

They are rarer than the other AOPS, but it's the other BSP / HSB, non-AOP that can bring in the biggest bucks.