Not theraphosids. These are curtain web spiders in Dipluridae, and they behave completely differently: enormous sheet webs with a funnel retreat, and the spider spends its life at the funnel mouth waiting.
L. megatheloides and L. fallax are the traded ones. Fast, long spinnerets, no urticating hairs, and a bite that is not medically serious but is not pleasant. They fill an enclosure with web in a way that makes even heavy-webbing tarantulas look restrained.
They breed readily and cost very little. The genus sits in a strange market position: affordable, easy, genuinely interesting to watch, and largely ignored because it is not a tarantula. That mismatch between quality and price is durable and probably will not correct.