Hi welcome,
Be careful when you buy a battered dt that you don't get a ringer. They are very prone to being stolen and as such there are a lot of ringers out there.
They were all built to copy the style of motocross of their era, so it will just be personal taste. If you love your yz then perhaps stick to a similar year dt.
When they get that old though they tend to be worse for wear. Fear not as parts are readily available and fairly cheap.
Any problems then throwing in the relevant sections and we'll help where we can