Thanks for the replies.
I am well aware $300 (even for a used unit) is not enough moola for a great preamp. However, I read from here and there on the forums little Chinese preamps or some DIY kits sound fantastic. Some even $50! Now, I am not saying $50 preamp will sound as good as CJ but can’t it even come remotely close? YS-Audio is a good example. Although I haven’t heard one, an audiophile friend was going to (maybe even he was at one point) be their US distributor. He was telling me it was an amazing preamp.
Sure, I can go little more on what I can spend but I am thinking unless I spend a good amount of money, (maybe $2K-$3K) I will not even hear a difference.