This together with what's been posted in Post 351772 (https://www.thevespiary.org/talk/index.php?topic=12580.msg35177200#msg35177200)
(Barium: "Nitriles to tertiary amines", Tryptamine Chemistry) makes for a really novel route from indole to DMT:
1) Et2N + CH2O + NaCN -> Et2N-CH2-CN (90%)
2) Indole + Et2N-CH2-CN -> Indole-CH2-CN (40%)
3) Indole-CH2-CN + Me2NH + CuCl + NaBH4 -> N,N-DMT (90%)
Using Aldrich pricing, a batch resulting in 20g+ of DMT would cost either $40 or $80, depending on if you want to synthesize the Et2NCH2CN yourself, or buy it ready-made. If you DIY, that's $0.20 a hit.