Hi Naroo,
From your question it seems that it is proprietorship business. In my opinion, in proprietorship, it doesn’t make any difference that in whose account money is received because both are one and the same.
In respect of accounting query, I would say that as antique items are sold through internet, hence payment from customer must be after delivery means at the time of delivery.
If inventory records are also maintained, then pass following entry at the time when antique items are delivered :- Customer Account Debit to (Particular / Specific) Antique Item Account. When payment is received then reverse Customer Account, and pass following entry :-
Cash / Bank Account Debit
to Customer Account.
IF inventory records are not maintained then pass the entry only after payment is received i.e. –
Sales Account Debit
to Customer Account.
Whatever I have given is what I think and my assumption about system of concerned ABC & Co. If my assumptions are wrong then tell accordingly. And other members, kindly rectify me if my answer is wrong.