Just for comparison and as an additional point of information: KEH currently has a ME SE in EX condition for $99. KEH EX truly is so.
If your aim is for the K5, save your money. You can get a very usable Pentax film camera for much less money (whatever it is you're thinking of splurging, or even the KEH $99) - and one that's more suited to a 'real' photo enthusiast, rather than a quasi point n shooter
And an addendum to what Joe says: if you plan to use it, and it is in the type of condition he describes, with the box etc, then you shouldn't plan on using it