eBay is (at time of writing) NOT calculating delivery times correctly, sorry! Basically there are 3 options at checkout:
The standard “free” delivery. 3-4 days working normally. Please don’t use this any later than Monday evening if the part is needed for this weekend, to avoid a risk of disappointment.
Priority delivery (small extra cost). 2-3 working days, normally. Weekend delivery should be fine up to Wednesday lunchtime.
Next day delivery (larger extra cost) – please message me to confirm this one before you select it, but usually weekend delivery is possible up to Thursday lunchtime. It’s also possible to choose a delivery day with this option, if that’s something you need.
These are just a guide since many of my customers are interested in riding at the weekend. Paying more for delivery *will* reduce delivery times, even if eBay doesn’t show this!
The above applies to UK customers – GSP customers will naturally have longer delivery times, please consult global shipping estimates