i have two suggestions:
1) it is better to see and hear the product,and meet the seller, before you buy, i.e., buy locally.
2) it is safer to sell than to buy if you don't audition the component before buying.
1) it is better to see and hear the product,and meet the seller, before you buy, i.e., buy locally.
2) it is safer to sell than to buy if you don't audition the component before buying.