That's nice thing! But you haven't said one important thing - where is you're store located? If you'll post address, maybe someone from forum will visit your store if he lives not farvfrom it 
.
Maybe Bitcoin fits better for online stores, not physical ones, but I support such initiatives. It's difficult to expect that significant part of users will pay in Bitcoin, but I'm sure that you'll find people who will appreciate that you give such option.
But I always had question about physical stores and Bitcoin. What they are doing when it takes hours to confirm transaction?
But when you buy in physical store, you can return device simply because you didn't liked it. It must be valid reason behind it - you got it damaged or it doesn't work properly.
.Maybe Bitcoin fits better for online stores, not physical ones, but I support such initiatives. It's difficult to expect that significant part of users will pay in Bitcoin, but I'm sure that you'll find people who will appreciate that you give such option.
But I always had question about physical stores and Bitcoin. What they are doing when it takes hours to confirm transaction?
Where I live (In Germany), you can basically return anything you bought within a few weeks in most stores.
If you damaged something or already used it up, that obviously doesn't apply but for tech stuff you just keep the receipt and return the product if you don't like it.
In this scenario, I could definitely buy something with bitcoin and profit from refund it
It's like shorting/selling bitcoin to fiat and if the price goes up, you just reverse it
I think it more applies when you buy online, you have 14 days to return gadgets even without any reason.If you damaged something or already used it up, that obviously doesn't apply but for tech stuff you just keep the receipt and return the product if you don't like it.
In this scenario, I could definitely buy something with bitcoin and profit from refund it
It's like shorting/selling bitcoin to fiat and if the price goes up, you just reverse it
But when you buy in physical store, you can return device simply because you didn't liked it. It must be valid reason behind it - you got it damaged or it doesn't work properly.