OBDII is great if you have the tools for it and the shop manual for the vehicle. Otherwise I see no difference between it and OBDI as OBDI will also give you the general codes like "bad O2 sensor signal" or "Excesive misfires" and without the need for a special scan tool as you can usually just jump a couple points and get the codes with a piece of wire.
I sure hope prices change. But as long as there's a shortage I don't see it happening. There has to be an increase in production first for used car prices to come down.
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