Re "on condition" in the UK. After many years of having my parachute (for gliding) repacked without problems I sent it to a different packer this year who promptly said that it had been time expired for about 5 years.
So who to believe?
I've had a quote of about £800 to have a new canopy fitted as the harness and pack are immaculate. Think I'd prefer that to buying a secondhand unit of unknown provenance.