2.83. ... We have seen that the general rule is that displaying goods in shops only constitutes an invitation to treat, although there are good reasons for taking a different approach (paras 2.22–2.23). However, what of a typical website that allows the customer to select the item, enter his payment details and seemingly conclude the agreement online. ♦ In this situation, then (absent the terms and conditions of the site providing to the contrary) it is suggested that it is clear that a contract has been concluded (see Christensen (2001) and Phang (2005)).
Based on my other question on ELU, what of is a question clause (Is the right term?), right? So why a period, and NOT a question mark, where I've placed a diamond?
Source: p 39 , The Law of Contract, 5 ed (2012), by O’Sullivan and Hilliard