Of the three most popular English creams (Trumper's, Taylor's, Truefitt & Hill), Trumper's is the most expensive. Taylor's while exhibiting the lowest price at almost 50% that of Trumper's, is every bit as good, if not better. Two good places to order Taylor's are:
www.classicshaving.com
www.qedusa.com

I have simply mentioned these two (Taylor's, T&H) because they, like the Trumper's, are English creams. If you want to branch out a little bit and experiment, there are MANY very good creams available for very reasonable prices.