The autoharp is not an easy instrument to go shopping for. Fortunately, I found some great places to buy autoharp accessoires online from cases to strings, tuners to tuning wrenches. You can see all of the essentials in my DIY Autoharp Repair Kit.
If there's something missing, please feel free to let me know, and I'll see if I can find a great deal on 'em.
Autoharp Strings - Model B: You can buy a full-set of autoharp strings at about 30% off the list price through Amazon. No individual strings, but a good deal for your backup set of strings.
NOTE: If you play an autoharp made in the early 70s or earlier, you will need to get Model A Strings.
Autoharp Quarterly: This magazine and site is now owned by Pete d'Aigle. Whenever I need individual autoharp strings or just about any gear, I buy direct from Pete.
Bob Lewis' Autoharp Works: Bob sells both individual strings and full sets of Fladmark autoharp strings at decent prices.
Elderly Instruments: Elderly sells single autoharp strings too for a lower price than Autoharp Works, but not if ye need them soon.
Korg CA1 Chromatic Tuner : Chromatic guitar tuner. I've used this tuner for as long as I've played the autoharp. Low cost, yet very effective. It works best if your instrument has a pickup.
Matrix MPU2 Clip-On Tuner Mic : This tuner uses clips onto the strings pins. It's ideal if you have a chromatic tuner and no pickup for your autoharp.
Tuning Hammer Lever Wrench L-shape Piano Tuner Spanner : This is the standard L-shaped wrench. It's not very expensive, but it's not my preferred tuning wrench.
Golden Gate DH-40 Dulcimer Tuning Wrench : This T-Shaped tuning wrench is better balanced to not strip your pegs. This is my recommended wrench.
d'Aigle Soft shell case : Tough American made case. Comes with handle and shoulder strap, large storage pocket Firm thick padding, heavy binding. Fits most custom and factory autoharps, designed for firm fit. I own two of these cases. They're twice the cost of the cases below, but MUCH better quality. I highly recommend them.
Oscar Schmidt Autoharp Gig Bag : Zippered, padded nylon bag fits 15-chord or 21-chord autoharps. Accomodates autoharps up to 23" long; 12" wide at the wide end; 5" wide at the narrow end. Not super durable, but inexpensive and convienent.
Oscar Schmidt AC448 Vinyl Semi-Hardshell Autoharp Case: Vinyl Semi-Hardshell case for the Autoharp. I tried an older model of this case. It didn't last long so I don't prefer it.
Golden Gate GGP-6 Large Pearl Thumb Picks, 12-Pack : The heavy picks you love! This is my all-time favorite thumb pick. Stays on lasts for months of heavy plucking. I go through them, so a 12-pack works great for me.
Jim Dunlop 9011R Dunl F/Pick White Med 12/Pk: On my index and third finger, I wear dunlap finger picks size medium. They're comfortable, stay on well, and the white ones are easy to find when they do occasionally go flying off my fingers.
Jim Dunlop 33P018 .018 Inch Nickel Silver Finger, 5-Pack : On my middle finger I wear a nickel silver finger pick. This gives me a nice shiny sound when I want to play a lead melody.