The zoom is functional/useable, but is on the stiff side. I have added a short video which demonstrates turning of the zoom - as you can see it's firm but shouldn't be too hard for anyone of normal strength.
eBay
Nice Protective Body Cover Case for Panasonic Lumix LX10 Soft Silicone Camera Bag for Panasonic Lumix L-X10 with Rubber Lens Cap
Aliexpress UK
eBay
LUMIX S 50 F1.8 Lens Sticker Decal Skin for Panasonic LUMIX S 50mm f/1.8 Lens Sticker Wrap Cover Film
Aliexpress UK
eBay
Original Single Focus Lens R 26mm f8 S-R26 Thin biscuits Lens For Panasonic Lumix S9 S5 S5II S1 S1H Camera L Mount System 26mmF8
Aliexpress UK
AF and MF both work normally. The zoom and manual focus rings are smooth. The Power OIS works normally. Nothing else is included in the sale. This is the Mark II "H-FSA100300" version of the Lumix 100-300mm lens.
eBay
K&F Concept AI(G)-M4/3 Lenses Adapter for Nikon G/F/AI/AIS/D Lenses to Micro 4/3 MFT Lens Panasonic Lumix Camera Mount Adapters
Aliexpress UK
Spanning a versatile range of focal lengths, the Lumix G Vario 35-100mm f/4-5.6 ASPH. This lens is in good overall condition and fully functional, displaying minor signs of previous use (see actual photos).
eBay
Auto Retractable Lens Cap Self Open and Close Lens Cover Protector for Panasonic LUMIX DMC-LX7GK LX7 Camera Accessories
Aliexpress UK
AF Vario 45-200mm F4-F5.6 OIS Lens. VGC++ used but looked after. NOTE - internally there is one spec of dust which does not affect. the pictures, I have tried to show this.
eBay
K&F Concept EOS-M4/3 Lens Adapter for Canon EOS EF Lens to M4/3 MFT Camera Body for Olympus PEN and for Panasonic Lumix Cameras
Aliexpress UK
It also has an adjustable tripod mount for image stability. THE LENS WILL FIT ALL PANASONIC LUMIX, OLYMPUS OM-D, AND OLYMPUS PEN. Panasonic Lumix Models: G1, GH1, GF1, G10, GH2, GF2, G3, GF3, GX1, G5, GF5, GH3, GF6, G6, GX7, GM1, GH4, GM5, GF7, G7, GX8, G85, G80, GX80, GX85, GX7 Mk II, GH5, GF9, GX800, GX850, G9, GH5S, GX9, GF10, GF90, GX880, G90, G91, G95, G100.
eBay
Len Caps Lenses Accessories For Panasonic Lumix DMC-GF3 GF2 GF1 G10 G3 G2 G1 GH2 Rear Lens + Body Cap Cover
Aliexpress UK
Olympus OM. I have personally used this lens on my Canon 60d, a Sony NEX-5 and a Panasonic G1 and GH2! There are M42 adapters available inexpensively for the following systems and more With a few minutes of practice you will soon get the hang of it!
eBay
Auto Lens Cap for Panasonic for LUMIX DMC-LX7GK LX7 Camera Anti-dust Lightweight Camera Lens Cover for LX7 Camera Replac
Aliexpress UK