i've never head of that glass. are you sure it's not anti-reflection? that i've heard of. it depends on what the glass does. if it cuts down on glare, maybe. but i don't think they would want to pay more just because you used some odd glass. the work itself is the valuable part, most people throw away the frame and get something new. and i don't think many people would know what that glass is either, i doubt they would be impressed. the only thing that could impress is the type of paper it's on. so it doesn't yellow over time.
If it is "museum" glass - it's worth it - has UV protection and very much less reflection protection. IF it is just frosted - anti glare/reflection glass - it is not worth it and will change the appearance of your work - it will dull the look. Museum quality glass does cost more.
If the glass offers UV protection and is optically clear, I'd say it's worth it. When offering these for sale, I'd make note of the fact that the glass is 'museum grade' and offers UV protection. (You can include that on labels, descriptions, etc.) Mentioning that will increase buyers' perception of the value of the item.
I've purchased anti-reflection museum grade glass and museum grade acrylics for a few special projects. It's expensive, but my buyers love it and understand that it adds value by greatly increasing the level of protection for their new artwork.
EDIT TO ADD: Here's a link, for readers wanting more info about museum glass and acrylic -
I own a frame shop and we hardly ever use regular non-glare glass due to the blurriness, but the Anti-reflection and Museum glass has been going like hotcakes! TruVue AR (anti-reflection) glass has a 75% UV filter and Museum Glass has a 99% UV filter, all the while killing the glare without blurring. It is great stuff! BUT it is VERY costly. If you can afford it - great!
One and only one rule when it comes to a product or equipment or tools. NEVER make do. get the very best you can afford. If you can't afford it now wait a while and then do it. Making do will only result in you not being satisfied with yourself and your customers will never have the respect for your work it deserves. Better is always better.
Mike, O don't know how would the buyer let me know his choice since I plan to sell through paypal button (which I don't have experience). On the website service I got, I don't have options to customise the product. Unless if there is a way to the customer let me know and I don't know.