Why does the seller want so much for those mags

[WallyG.]

The mags originally discussed are all in VG+ used condition (11) L4A1 Enfield 68 (1) L4A1 Enfield 66. I'll be glad to report any details if such is requested... I concur with previous observations... these are not that easy to find over here in the US... not many of the weapons that used them are here so it follows. The recent demand is driven more by FN FAL/L1A1 battle rifle fans looking for high capacity mags... even though these are not the ideal solution for that scenario. But for the price here... still sought after as quite a few L1A1 parts kits were imported and have been reassembled into functioning semi auto rifles.

[Longshaor]

The problem with 30-round L4A1 mags here in the States is that since there aren't many L4 Bren guns floating around the only people with an interest in these are L1A1 & FAL shooters. Most L1A1s here are built with Imbel metric receivers, so magazines with the Commonweath pattern front lug won't fit. DS Arms out of California contributed to the problem by buying large stocks of L4A1 magazines and 'converting' them to work in metric receivers by removing the front lug and punching the 'V' shaped FN-style front lip in them. From what I've been told by several owners of these butchered mags, they don't feed reliably in metric or inch pattern rifles. DSA claimed these were a stop-gap until their new production 30 and 40-round mags were available, but last I heard (4-6 months ago) they were several years behind schedule and no release date was in sight.

As far as the original subject of the post, I think it's telling that, even given their relative scarcity, these mags have been getting relisted on GB for about a year now without selling.