Ann: AMA Acquires Australia's Largest Accident Repair Group, page-10

I think your comment on the price paid 7.5 times is valid. Does not seem to be that value adding when considered on a P/E basis.
Only time will tell if you got your timing right.
I bought GXL AT $1.00 Sold various times $7.50 to $8.00 on the way down. My best ever investment. Seems like a good decision to sell now. But could have easily been shaken out on the way up.
I bought GEM $1.30 sold $3.50. Not too bad.
I bought SGH $2.80 - still hold!! ouch. Not good. Didn't push the sell button at $7.50 when I could have.
I bought AMA $0.39 and still hold
Now buying BLX

How do you know when to sell? For me when the key metrics increases in revenue/ NPAT / EPS don't make the grade.

For me, too early to sell AMA. But will admit that maybe the share price has some consolidation work to do at this level.

Cheers
Gosouth