If you can afford a new Ameritron Amplifier then I say go for it. On the other hand if you can't afford the new amplifier, then look into a used Ham Radio Amplifier. As I have said before there are some very good buys on Ebay for used Ham Radio Equipment. The only thing I always advise is to check out the sellers reviews before you buy anything. Always remember to protect yourself as you are the buyer and it is a buyer beware world. I remember that old saying " Them That Don't Look Usually Get Took".
There is a wide variety of Ham Radio Amplifiers for sale on Ebay. Some of them are older than others, but are in excellent condition. I have also found that some of them may only put out 250 watts to 500 watts. Then there is the other group putting out over 800 watts to 3000 watts. It all comes down to what you prefer and what you can spend. I have heard some fellow ham radio operators running 250 watts into a nice 3 element 20 meter beam antenna and they sound awesome. If you have your ham radio shack running properly you will be amazed at what you can actually do.
If you are looking into a used amplifier make sure to click on this link USED HAM RADIO AMPLIFIERS
Remember that some Ham Radio Amplifiers such as RM Italy are not approved by the FCC to be used in the United States.