Take the first offer or shop around? People will do different things in different situations. Finding the best deal can be fun and rewarding but also time consuming and frustrating.
Are you someone that loves to find the best terms? Or if you find a price you think is reasonable, will you stop looking and go ahead and buy? Searching through all the possible options you can think of can be quite an interesting exercise. Some people thrive on it. Others do it out of current necessity. Sometimes it depends on the item, your finances, time available, or your desire to know all of the options.
Buying milk should be quite straightforward. You should easily and quickly be able to compare value based on standard sizes and fairly common prices. You may be a shopper for milk. However you may also be a grab and go kind of person for this product. Given its required nature for many things, and its relative low and stable price, some people wont even notice the price.
However, if you look at airline tickets or holidays, that may be another matter. I have spent too long reviewing some flight bookings. Mainly due to the timing options available. Though sometimes the price difference can be so great that you keep looking as you know what isn’t a great deal.
Finding the best deal is almost like a game. Spending enough time but not too much is the ideal way forward.