The problem with buying the track and transformer separately is the total price will probably be higher.
A loop of Fastrack goes for about $50.
An 80w transformer goes for about $20
The Strasburg set without track & transformer goes for about $400.
If you tack on shipping for each one separately, it may be about $50 more.
That's a total of $520 easily.
A brand new set sold on ebay recently for $429.99 plus $40.00 s/h.
If I were you, Larry, I'd keep looking for a complete set. It may take a while longer, but you'd save money.