55 gallon tank?

sods law go on holiday come back to leaking loft cold storage [55 gal poly tank] what's a fair price to replace?

Easy access and boarded loft up to tank all pipework accessable no scrabling around wall end. Would post photo but for some reason this site doesn't have that facility. Oh! needs stop valve in feed pipe as the installing plumber did not have his brain in gear at installation time many years ago.