All of the above. If you want new stick with the dealers like stated above but, if you want used, QRZ,QTH,Eham as stated above. Frankly, I like buying used. Just as on Ebay, look for reviews or feedback on these used equipment list and don't be afraid to post whether anyone has dealt with the person you are considering buying from. I you want new, I only deal with HRO. I have had no trouble with the one here in VA. They may not be cheapest but, cheapest is not always better.