Yes they should be.  Tower will have a great selection but the smaller ones 
probably will be a little more hit or miss.  They have released couple of 
records in recent years that are really good and in fact the last one was 
nominated for a grammy!  Try to get their firs recordt which has a red cover 
with the band name written in yellow.  Most any comp on Hearbeat will be at 
least decent and many on Trojan are certified classics.  BTW, for you New 
Yorkers, in the Bronx Coxsone Dodd (who discovered the Wailers and recorded 
many of the early ska standards on his label Coxsone)  has his own record store 
that sells many of the original 45s and Lps.