In reply to Peggy:
Not sure how much experience you have so it's hard to be specific. You'll get gear in Kathmandu but it can be busy and hard to gauge the prices if you're stuck for time. Use Dollars or Euro for larger value items or if you don't want to change to a lot of Rupees. Feel free to haggle. Watch out for conterfeit stuff in Thamel it's generally second rate and full of feathers instead of down. Unbranded locally made items can be very good but check to be sure.
I'd suggest calling the exp leader and see if you can get stuff up in Lukla or at a teahouse. This avoids the weight limit flying to Lukla and means less to carry. Check the crampons fit the boots well in advance of needing them. I'll be up at Mera towards the end of October. Drop an email if you need anything else.