timmmay: Think you should just buy them.
Some markets sell jalapenos for $1 each. There's pick your own down near Wellington, maybe there is up there too, much cheaper around $10/kg that way than Moore Wilson's $50/kg.
I could sell some jalapeno but they'd need to be couriered. Packing in a decent box to protect them and delivery might cost $20 so is unlikely to be worthwhile.
The Otara markets had hot chillis at $45 per kilo a few weeks back. That's one reason I'm growing my own. I didn't pay anywhere near that last time I purchased them.
Not sure how much jalapenos cost, but they aren't plentiful in Auckland, and I'm looking to grow those as well as their flesh to heat ratio is good.