Quick question on XCN: is it possible to create two transactions, from and to similar addresses with a similar amount of XCN?

More concrete, suppose I wish to buy two products from a vendor online. First, I create a transaction: A --> B, amount X
Then immediately after my purchase, I decide I wish to buy another product with the same price, soL: A --> B, amount X.

Now there's two transactions from account A, to account B, with amount X. Would that be considered valid (taking into account a scenario where one transaction is re-submitted)?