The Missing Arrowhead

I didn’t want it, the arrowhead
but I bought it anyway
it sat there on my windowsill
wasting day after day

rust covered the piece, I had no idea
what trials it had to face
it sat and stayed until finally
it vanished without a trace

I didn’t want the arrowhead
but it disappeared after I had paid
I should have gotten my money’s worth
and made sure it had stayed