Altrincham Grammar School for Boys Parents and Friends Association has a second-hand uniform service. See below. 
Comparable prices at Monkhouses in brackets.

Costs:
Blazers: £15 - £35 (£70)
School Jumpers: £10 - £15 (£25)
Tie: £4 (£8.75)
Games/Rugby shirts: £10 - £15 (£30)
Games/Rugby Shorts: £8 - £10 (£19)
White PE Top: £8 - £10 (£19)
White PE Shorts: £5 - £8 (£15)
PE Socks: £4 (£9)
Apron: £3 (£7.50)
White School Shirt: £2.00 
Black/Charcoal School Trousers: £5

All monies go directly to the PFA fund.  Please email agsb.preloveduniform@gmail.com