But it must be added, that the chances of being able to buy P.sanderianum in bloom are very, very, small. I can't remember EVER seeing species paphs in flower offered for sale. They just don't exist in that sort of quantity. Paphs are different to other orchids - go and amire a Paph just awarded, and want one - no you can't have one (almost) ever ! Unlike Catts, Vandas, Oncids, you name them.
Why not ? Well the awarded Catt etc can be meristemmed ; how many seedlings would you like to order for delivery in say 18 months time ? 100 ? 1000 ? 10,000 ? No problem, we'll just set up a production line.
But you can't do that with Paphs ; the best you can be offered is a division from the parent when it is big enough to divide - if the owner is willing to sell, and why should he, anyway (?) and if he is, then how much will that cost you, do you think ? ( I refused an offer of £500 for a division of a Paph where I had just got an AM/RHS and missed the FCC by one vote only) and a Paph breeder listening to my conversation told me afterwards - you were right to refuse, that guy was just trying it on - , double it, and maybe you would start to think about it...)
So what you do come back to is seedlings. Self that blooming plant, and maybe you will get a pod with maybe 500 seeds, and after sowing, growing, replating twice, and growing on in compots - 3, 4 or 5 years later - hey you can have a potted up seedling for only, lets say $50 and considering all the skill and work that went into it, that's fair enough...and remember that whilst the pod was developing, the plant was not growing - a one year or more set-back in its life..
if all this seems OTT, grow something different !