Don't go buying a new engine just yet. The oil has to be going somewhere. If it is not leaking out, it must be burning it. Is there ever any smoke coming from the tail pipe?
The PCV valve is a simple maintenance item. A new one can be purchesed at an autozone or advance auto parts for $3. It is an L-shaped piece of plastic located above the "T" in the word "VTEC" on your engine's valve cover. It can be replaced by using a pair of pliers to loosen the clamp on the hose. Then pop out the old PCV valve, and replace with a new one. Put the clamp back on the hose and you are done. here's a pic of my engine compartment.
Do you see that little piece of plastic abode the "T" in VTEC with a hose coming out of it?
The PCV valve replacement may not solve the problem - but for $3 it is definitely worth a shot.
A replacement engine (you would need to find a low mileage engine from a salvage yard - a brand new engine would be rediculous to buy) would cost upwards of $1,000 after you figure in the labor. You could probably find a used engine for $150 or so, but the labor will be high.