The new owner purchased an asset, the existing business. Basically the purchase price less any cash equals seller financing. It is recorded that way.  OBE is only for existing balances at time you begin using accounting program. Go back to date of purchase and create the purchase. Desktop can only record purchases by check, credit card or by journal entry. If any money changed hands use check. If no money changed hands use a journal entry

Debit Purchase price of business

Credit Seller Financing