If by 'subscription' you are referring to a 'store'; the answer is:
DON'T DO IT
You don't need a 'store' to list things for sale
You should start slowly with lower priced items as there are lots of systems that 'scammers' use on 'new' sellers (and sometimes even 'seasoned veterans).
Electronics are VERY tricky because they can be 'damaged' (not visually seen) easily during the shipping process and buyers WILL get their money back.
