I got some Kreitler rollers off of ebay for pretty cheap last month.
After riding on them for awhile, all I can say is Sorry to anyone
that has had to ride behind me in a pace line. What a difference
in both keeping a straight line and also not wasting as much energy
going side to side. Plus, I can ride indoors when all it does is rain
for the past 2 weekends. Don't have rollers? Get some.