Last week I visited a small museum in Neuville St Vaast, a village close to the Vimy memorial a few miles north of Arras. It is almost exclusively dedicated to WW1. Admission was 4 Euros. I was refused permission to photograph inside. It may be small but is packed with ammo and equipment. They state that they are prepared to buy / sell exchange. An expended artillery fuze (and therefore incomplete) costs as little as 4 Euros but for grenades they charge around 30 Euros for a tatty relic and up to nearly 100 Euros for one in more complete condition and quality. A WW2 No 69 grenade was for sale for 95 Euros. I didn't ask about their FFE documentation if indeed they supply any, or whether such documentation if it exists might be accepted by UK and other authorities. The address is 48 Rue Nationale 62580 Neuville St Vaast tel (00 33) 21 59 17 76. The museum is recognisable by two very big shells stood outside the front door.